Question

The animal who possesses notochord throughout life is

• A. Fish
• B. Amphioxus
• C. Bird
• D. Snake

Answer 1

The correct option is B Amphioxus

Amphioxus is also known as lancelets. This includes mainly marine chordates. They have a hollow nerve cord. The nerve cord runs to the posterior end of the body. The nerve chord also enters the head so they are also known as cephalo nerve chord. The dorsal nerve cord is made up of a cylinder of cells to form a toughened rod-like nerve chord. It is not protected by bone. They don't have a well-developed backbone rather they have a notochord.

So, the correct answer is option B.